More on Saturn’s aurora

Following Tom Stallard’s EPSC 2010 presentation on videos of the changes in Saturn’s aurora (including faint auroral signals) and linking that to events in the magnetosphere in general, there’s been a couple of news items in magazines. New Scientist managed to get the wrong end of the stick, believing the infrared aurora to be the new thing (it isn’t, just the video of it and the faintness of the signal) whereas Astronomy Now gave a more proper writeup, including a genuinely new thing from the same session on the detection of Saturn’s radio aurora. Radio emissions come from charged particles getting deflected by magnetic fields, which is what happens when auroral particles head to the auroral regions of a planet. Satellites have long been able to put themselves in the thin zone of emissions from Earth, Jovian observers have detected the Io current associated auroral radio signals, but Saturn has been more elusive to satellites in its region until now.


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